I don't see where you are declaring / defining the variable 'index', which is used as the terminator for the two loops on the lines in question. My guess is that it is defined elsewhere (in some header or other) as a pointer...

Hmmn... I am not sure. Is this a user defined class? If so ... I dont think you can use < or > without overloading it to take your object and compare it to an integer. Do you have more to the code than what you posted?

I have a 2d matrix with dimension (3, n) called A, I want to calculate the normalization and cross product of two arrays (b,z) (see the code please) for each column (for the first column, then the second one and so on).
the function that I created to find the ...

Write a C program that should create a 10 element array of random integers (0 to 9). The program should total all of the numbers in the odd positions of the array and compare them with the total of the numbers in the even positions of the array and indicate ...